Structural brain imaging studies offer clues about the effects of the shared genetic etiology among neuropsychiatric disorders.

There were a few additional nominally significant negative correlations, which did not survive multiple testing correction: MDD and epilepsy ( r = −0.37, p = 0.02), MDD and ADHD ( r = −0.33, p = 0.004), SCZ and ADHD ( r = −0.32, p = 0.005), ADHD and epilepsy ( r = −0.36, p = 0.02), and a positive correlation between MDD and ASD ( r = 0.26, p = 0.02).

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